Just read the 'Gentoo x11-libs/libxcb 1.4 Upgrade Guide' before upgraing to x11-base/xorg-server-1.6. After an emerge --sync I have x11-base/xorg-server-1.6.3.901-r2 listed as x86, but libxcb-1.4 is listed as ~x86. The latest x86 version of libxcv is 1.1. My system is almost completely x86, and I often run emerge -D world. Should I mask >=x11-base/xorg-server-1.6 until x11-libs/libxcb-1.4 is stable?

My internet connection is really slow, so committing about 90 packages to stable takes some hours. Sync in about an hour from now on and you will see no problems anymore._________________Christian Faulhammer, Gentoo Lisp project, GNU Emacs wrangler
http://www.gentoo.org/proj/en/lisp/ #gentoo-lisp on FreeNode